The NENA NG9-1-1 CLDXF standard supports the exchange of
United States civic location address information about 9-1-1 calls, both within
the US and internationally. The NENA NG9-1-1 CLDXF standard covers civic
location addresses within the United States, including its outlying territories
and possessions. The NENA NG9-1-1 CLDXF standard defines the detailed data
elements needed for address data exchange.

The CLDXF document was developed to:

Provide a definitive set of core
civic location data elements that support emergency call routing and dispatch.

Map those civic location data
elements to the corresponding Federal Geographic Data Committee, United States
Thoroughfare, Landmark, and Postal Address Data Standard, Document Number
FGDC-STD-016-2011 set of data elements, which was sponsored by the Urban and
Regional Information Systems Association (URISA) and the National Emergency
Number Association (NENA).